ASTRONOMY & ASTROPHYSICS, vol.425, no.1, 2004 (SCI-Expanded)
Article / Article
ASTRONOMY & ASTROPHYSICS
Science Citation Index Expanded (SCI-EXPANDED), Scopus
gamma-rays : observations, Galaxy : centre, SUPERMASSIVE BLACK-HOLE, SUPERSYMMETRIC DARK-MATTER, GALACTIC-CENTER, MILKY-WAY, ASTERISK, CHANDRA, SYSTEM, MODEL, TELESCOPES, EMISSION
Middle East Technical University Affiliated:
We report the detection of a point-like source of very high energy (VHE) gamma-rays coincident within 1' of Sgr A* obtained with the HESS array of Cherenkov telescopes. The gamma-rays exhibit a power-law energy spectrum with a spectral index of -2.2+/-0.09+/-0.15 and a flux above the 165 GeV threshold of (1.82+/-0.22)x10(-7) m(-2) s(-1). The measured flux and spectrum differ substantially from recent results reported in particular by the CANGAROO collaboration.